CN105807418B - A kind of industrial endoscope optical system - Google Patents
A kind of industrial endoscope optical system Download PDFInfo
- Publication number
- CN105807418B CN105807418B CN201610328569.XA CN201610328569A CN105807418B CN 105807418 B CN105807418 B CN 105807418B CN 201610328569 A CN201610328569 A CN 201610328569A CN 105807418 B CN105807418 B CN 105807418B
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- lens
- optical system
- diaphragm
- industrial endoscope
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2423—Optical details of the distal end
- G02B23/243—Objectives for endoscopes
- G02B23/2438—Zoom objectives
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Lenses (AREA)
Abstract
The present invention is a kind of industrial endoscope optical system, including window glass, reflecting mirror, diaphragm, lens group, and the optical axis that lens group is collectively formed, multiple lens are by the lens L1 that is set in turn on optical axis, lens L2, lens L3, lens L4 and lens L5 composition, the optical axis is reflected by reflecting mirror across window glass, the window glass is arranged in parallel with unreflected optical axis, in lens L1, lens L2, lens L3, between lens L4 or lens L5 one at be equipped with diaphragm, lens group between the diaphragm side and reflecting mirror organizes lens before constituting, for curvature correction spherical aberration and astigmatism, the lens group of the diaphragm other side organizes lens after constituting, it dissipates for generating reversed image and corrects the curvature of field and distortion.Energy curvature correction spherical aberration of the present invention and astigmatism and the correction curvature of field and distortion, the depth of field is big, focuses convenient for rear end optical fiber, and good airproof performance is anti-pollution.
Description
Technical field
The present invention relates to short distance imaging system technology fields, and in particular to a kind of industrial endoscope optical system.
Background technique
Industrial endoscope can be used for the inspection and sight in the place that high temperature, toxic, nuclear radiation and human eye can not observe directly
It examines, is mainly used for automobile, aero-engine, pipeline, machine components etc., can be not required to dismantle or destroy assembling and equipment stopping fortune
Non-destructive testing is realized in the case where row, is widely used in aviation, automobile, ship, electrical, chemistry, electric power, coal gas, atomic energy, soil
Each department of the modern times such as Wood construction core industry.Industrial endoscope can also be coupled with camera, video camera or electronic computer,
Composition photograph, camera shooting and image processing system, to carry out the monitoring of visual field target, record, storage and graphical analysis.
General endoscope depth of field under industrial operations environment is smaller, inadequate for leakproofness in the space of heavy contamination.
Summary of the invention
The object of the present invention is to overcome the problems of the prior art, provides a kind of industrial endoscope optical system.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of industrial endoscope optical system, including window glass, reflecting mirror, diaphragm, lens group and lens group are common
The optical axis of formation, multiple lens by be set in turn on optical axis lens L1, lens L2, lens L3, lens L4 and thoroughly
Mirror L5 composition, the optical axis are reflected by reflecting mirror across window glass, and the window glass is parallel with unreflected optical axis to be set
It sets, diaphragm, the diaphragm side and reflection is equipped at one between lens L1, lens L2, lens L3, lens L4 or lens L5
Lens group between mirror organizes lens before constituting, and is used for curvature correction spherical aberration and astigmatism, group after the lens group of the diaphragm other side is constituted
Lens dissipate for generating reversed image and correct the curvature of field and distortion.
Further, the preceding group lens include lens L1, and the lens L1 is positive light coke simple lens, is organized thoroughly after described
Mirror include the lens L2 set gradually from the near to the distant from diaphragm side, lens L3, lens L4 and lens L5, the lens L2, thoroughly
Mirror L3, lens L4 and lens L5 are the latter half of double gauss microscope group.
Further, the lens L3, lens L4 and lens L5 are positive light coke normally glued microscope group, lens L3, lens
L4, lens L5 are arranged backwards to diaphragm, are at not dizzy position, dissipate for generating reversed image.
Further, the lens L5 close to a side of image planes to curvature of the image, to correct the curvature of field and distortion.
Further, the window glass and chief ray angle on object space axis: lower GPI is 56.6 °；Its clear aperture is ellipse
Round: lower GPI is 74*54mm；Material: fused silica.
Further, the reflecting mirror and chief ray angle on object space axis: lower GPI is 28.3 °；Its clear aperture is ellipse
Shape: lower GPI is 120*52mm；Material: fused silica.
Further, the material of the lens L1 is H-LAK7, clear aperture 49mm.
Further, the material of the lens L2 is H-ZF7LA, clear aperture 34mm.
Further, the material of the lens L3 and lens L4 is H-ZK7, and the clear aperture of lens L3 is 42mm, lens
The clear aperture of L4 is 38mm.
Further, the material of the lens L5 is H-ZLAF50B, clear aperture 33mm.
The beneficial effects of the present invention are:
Present system energy curvature correction spherical aberration and astigmatism and the correction curvature of field and distortion, the depth of field is big, is convenient for rear end optical fiber
Focusing, good airproof performance are anti-pollution.
Detailed description of the invention
Fig. 1 is optical system light path structure chart of the present invention；
Fig. 2 is window glass structural schematic diagram of the invention；
Fig. 3 is lens L1 structural schematic diagram of the invention；
Fig. 4 is lens L2 structural schematic diagram of the invention；
Fig. 5 is lens L3 structural schematic diagram of the invention；
Fig. 6 is lens L4 structural schematic diagram of the invention；
Fig. 7 is lens L5 structural schematic diagram of the invention.
Figure label explanation: 1, window glass, 2, reflecting mirror, 3, diaphragm, L1-L5 are lens.
Specific embodiment
It is below with reference to the accompanying drawings and in conjunction with the embodiments, next that the present invention will be described in detail.
As shown in Figure 1, a kind of industrial endoscope optical system, including window glass 1, reflecting mirror 2, diaphragm 3, lens group,
And the optical axis that lens group is collectively formed, multiple lens are by the lens L1, the lens L2, lens that are set in turn on optical axis
L3, lens L4 and lens L5 composition, the optical axis are reflected by reflecting mirror 2 across window glass 1, the window glass 1 with not
The optical axis of reflection is arranged in parallel, and diaphragm 3 is equipped at one between lens L1, lens L2, lens L3, lens L4 or lens L5,
Lens group between 3 side of diaphragm and reflecting mirror 2 organizes lens before constituting, and is used for curvature correction spherical aberration and astigmatism, and diaphragm 3 is another
The lens group of side organizes lens after constituting, and dissipates for generating reversed image and corrects the curvature of field and distortion.
It is described before group lens include lens L1, the lens L1 be positive light coke simple lens, it is described after group lens include from
Lens L2 that 3 side of diaphragm is set gradually from the near to the distant, lens L3, lens L4 and lens L5, the lens L2, lens L3, thoroughly
Mirror L4 and lens L5 is the latter half of double gauss microscope group, and is complicated.
The lens L3, lens L4 and lens L5 are positive light coke normally glued microscope group, lens L3, lens L4, lens L5
It is arranged backwards to diaphragm 3, is at not dizzy position, is dissipated for generating reversed image.
The lens L5 close to a side of image planes to curvature of the image, to correct the curvature of field and distortion.
As shown in Fig. 2, the window glass 1 and chief ray angle on object space axis: lower GPI is 56.6 °；Its clear aperture is
Ellipse: lower GPI is 74*54mm；Material: fused silica.
The reflecting mirror 2 and chief ray angle on object space axis: lower GPI is 28.3 °；Its clear aperture is ellipse: lower GPI
For 120*52mm；Material: fused silica.
As shown in figure 3, the material of the lens L1 is H-LAK7, clear aperture 49mm.
As shown in figure 4, the material of the lens L2 is H-ZF7LA, clear aperture 34mm.
As shown in Figure 5 and Figure 6, the material of the lens L3 and lens L4 is H-ZK7, and the clear aperture of lens L3 is
The clear aperture of 42mm, lens L4 are 38mm.
As shown in fig. 7, the material of the lens L5 is H-ZLAF50B, clear aperture 33mm.
Maximum caliber 47mm in lens group, object plane to plane mirror center be respectively 1470 (on) and 1450 (under), put down
Face mirror center is to lens 55mm.
Object high 92mm, lower GPI image height 2.68mm, corresponding fiber end face size 3.79*3.79mm.
The principle of the invention
Light channel structure meets approximate telecentric beam path in image space in the present invention, to guarantee each visual-field beam completely into fiber optic bundle
It is interior, in which:
1) system focal length: 45mm；
2) enlargement ratio: 0.02892 (under), single optical fiber bore correspond to object plane 0.3458mm (under)；
3) object space NA=0.014, image space NA=0.4358 (under), it is less than fiber numerical aperture 0.63, guarantees that light is complete
Enter optical fiber entirely.
With above-mentioned parameter, the optical system index reached using structure of the invention are as follows: object plane size is 130 × 130 mm,
Object plane resolution ratio is less than 2mm, and fiber facet 4 × 4mm of size shares 400 × 400 optical fiber；True field is image height ± 92mm；It is single
A fibre diameter is 4mm/400=0.01mm；Wave band is 550nm-700nm；Object distance is from object plane to mirror center 1470mm
(on)；Bundle resolving power fN = 57.7lp/mm。
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of industrial endoscope optical system, including window glass (1), reflecting mirror (2), diaphragm (3) and lens group are common
The optical axis of formation, which is characterized in that the lens group is by the lens L1, lens L2, lens L3, lens that are set in turn on optical axis
L4 and lens L5 composition, the optical axis are reflected by reflecting mirror (2) across window glass (1), the window glass (1) with it is not anti-
The optical axis penetrated is arranged in parallel, and is equipped with diaphragm (3) at one between lens L1, lens L2, lens L3, lens L4 or lens L5,
Lens group between diaphragm (3) side and reflecting mirror (2) organizes lens before constituting, and is used for curvature correction spherical aberration and astigmatism, light
The lens group of late (3) other side organizes lens after constituting, and dissipates and corrects the curvature of field and distortion for generating reversed image, organize lens packet before described
Include lens L1, the lens L1 is positive light coke simple lens, it is described after group lens include from the near to the distant successively from diaphragm (3) side
The lens L2 of setting, lens L3, lens L4 and lens L5, the lens L2, lens L3, lens L4 and lens L5 are double gauss mirror
The latter half of group.
2. industrial endoscope optical system according to claim 1, which is characterized in that the lens L3, lens L4 and thoroughly
Mirror L5 is positive power lens group, and lens L3, lens L4, lens L5 are arranged backwards to diaphragm (3), is at not dizzy position,
It is dissipated for generating reversed image.
3. industrial endoscope optical system according to claim 2, which is characterized in that the lens L5 is close to the one of image planes
Lateral curvature of the image, to correct the curvature of field and distortion.
4. industrial endoscope optical system according to claim 1, which is characterized in that the window glass (1) and object space
Chief ray angle on axis: GPI is 56.6 °；Its clear aperture is ellipse: GPI 74*54mm；Material: fused silica.
5. industrial endoscope optical system according to claim 1, which is characterized in that the reflecting mirror (2) and object space axis
Upper chief ray angle: GPI is 28.3 °；Its clear aperture is ellipse: GPI 120*52mm；Material: fused silica.
6. industrial endoscope optical system according to claim 1, which is characterized in that the material of the lens L1 is H-
LAK7, clear aperture 49mm.
7. industrial endoscope optical system according to claim 1, which is characterized in that the material of the lens L2 is H-
ZF7LA, clear aperture 34mm.
8. industrial endoscope optical system according to claim 1, which is characterized in that the material of the lens L3 and lens L4
Material is H-ZK7, and the clear aperture of lens L3 is 42mm, and the clear aperture of lens L4 is 38mm.
9. industrial endoscope optical system according to claim 1, which is characterized in that the material of the lens L5 is H-
ZLAF50B, clear aperture 33mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328569.XA CN105807418B (en) | 2016-05-18 | 2016-05-18 | A kind of industrial endoscope optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328569.XA CN105807418B (en) | 2016-05-18 | 2016-05-18 | A kind of industrial endoscope optical system |
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| Publication Number | Publication Date |
|---|---|
| CN105807418A CN105807418A (en) | 2016-07-27 |
| CN105807418B true CN105807418B (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610328569.XA Active CN105807418B (en) | 2016-05-18 | 2016-05-18 | A kind of industrial endoscope optical system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116360091B (en) * | 2023-05-31 | 2023-08-22 | 佛山光微科技有限公司 | Optical imaging system of large-view-field high-resolution OCT endoscope |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179226A (en) * | 1994-12-22 | 1996-07-12 | Asahi Optical Co Ltd | Objective optical system for endoscope |
| CN1932573A (en) * | 1996-06-18 | 2007-03-21 | 索尼株式会社 | Optical image recording system, and associated processing system |
| CN103229087A (en) * | 2010-12-15 | 2013-07-31 | 奥林巴斯医疗株式会社 | Endoscope optical system |
| CN103226235A (en) * | 2013-04-22 | 2013-07-31 | 北京首量科技有限公司 | Dual-waveband optical fiber transmission optical system of endoscope lens |
-
2016
- 2016-05-18 CN CN201610328569.XA patent/CN105807418B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179226A (en) * | 1994-12-22 | 1996-07-12 | Asahi Optical Co Ltd | Objective optical system for endoscope |
| CN1932573A (en) * | 1996-06-18 | 2007-03-21 | 索尼株式会社 | Optical image recording system, and associated processing system |
| CN103229087A (en) * | 2010-12-15 | 2013-07-31 | 奥林巴斯医疗株式会社 | Endoscope optical system |
| CN103226235A (en) * | 2013-04-22 | 2013-07-31 | 北京首量科技有限公司 | Dual-waveband optical fiber transmission optical system of endoscope lens |
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| Publication number | Publication date |
|---|---|
| CN105807418A (en) | 2016-07-27 |
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